Nut lock



E. W. UTZLER,

NUT LOCK Filed July 5, 1924 INVENTOR GZZMWM,

PatentedOact. 4, 1927.

UNITED sTr ELlVlIER w. UTZLER, or CORLISS s'rA'rIoN, PENNSYLVANIA.

NUT LOCK.

Application filed July 5,

My invention consists of an improvement in locking devices for nuts andbolts. It has for its object to provide such a'device which may be utilized with a standard bolt and nut by a slight change in the nut and the addl tion of a special distorting member.

The invention utilizes such member in the manner hereinafter described through av novel principle and with a resulting holding effect and efiiciency which cumulates to a maximum as the nut is screwed tight.

In the drawings, illustrating one preferred embodiment of the invention: I 1 v Fig. 1 is a sectional view showing a nut and bolt with the distorting member in position for application; 7

Fig. 2 is a plan view of Fig. 1;

Fig. 3 is a view similar to Fig. 1, showing the nut screwed down tight; I

Fig. 4 is a view of the threaded end of the bolt, illustrating the condition of the threads after application;

Fig. 5 is a perspective detail view of the distorting member before use; and

Fig. dis a similar view, showing such. member after use.

In the drawings, 2 represents an ordinary standard bolt having the usual threaded portion 3 for application of the usual standard nut 4 to exert tightening or binding pressure against the member 5 through which the bolt 2 extends by hole 6. The threaded portion 3 may be either straight or tapered, and preferably of V-form in cross section, withcorv responding threads 7 in nut 4. The nut 4 is provided at one side with a slot 8 extending through from top; to bottom parallel withits longitudinal center and having a rear similarly parallelfiat wall 9 and opposite end 40 walls 10 10, providing a generally rectangular cavity extending inwardly from the threads 7, as shown.

Atthe opposite side of the bolt hole of the nut, or I at any other convenient posit1on, is a similar cavity 11, the walls of which may be like thoseof cavity 8 or of any other desired shape. Cavity 11, being for the purpose of collection and escape of cuttings, is

merely a clearance opening and its shape in cross section is not essential, provided sufficient clearance space is presented.

i ,The active element of the-invention is the distorting member 12 consisting of a key or lever preferably rectangular in cross section,

adapted to freely fit within cavity 8, and

' provided with opposite tapered faces 13 and.

1924. Serial Ne. 724,189.

14 respectively, inthe mannerof a wedge, Whlle such member resembles a wedge in shape, 1tS,2lCl31OI1, however, is more in the nature of a lever, ashereinafter described, 0 I

in position, with its wide base resting on the 3 surface of member 5 and its smaller portion extending loosely into cavity 8 upon initial application of nut 4. Upon turning the nut,-

member 12 will be carried loosely around with it, without any binding effect untilthe nut iswithin a few turns, say two or three, of its final clamping position. :Upon being screwed down to such position, the wide end of member 12 will abut against surface 5, the bottom of inner wall 9 of cavity 8 will then commence to bind on the outer face 13 of member 12, gradually forcing its base in wardly into increasingly tight contact with the threads '3 of'bolt 2. As the force increases, due to the movement of the nut, the threads of the bolt will cut or score theinner face of member 12, as indicated at16, Fig. 6, to a degree. Thereafter, as the nut is screwed home, the member 12 being carried around with it, will shear or planeaway the y outer edge portion of. the threads, with a gradually increasing depth of cut, until the nut 4 is finally screwed down tight. effect is indicated at 17, Fig. 4.

'In the meantime, such small cuttings or 9;, chips, due to the action of. member 12 on the threads, will be carried around and will passbetween the threads of the bolt and the threads of the nut, some of theinfinally arriving at clearance cavity 11 for collection and release. Others'of thecuttings will become tightly jammed between the threads I of the bolt and the nut, increasing the holding action, and when'the nut is given the Such final turn to bring it down tightly into contact with the member 5 being bolted, all

of the several parts will be very tightly compressed and brought into close intimate contact, including the cuttings, some of which still remainbetwe'enthe threads.

When all of the parts are thus tightly brought together under the increased turningl -tensiol xi'ldistortinlg member will also "I be very tig tlyl j'ammed and forced intothe f lower thrgadsofth bolt with' extreme tight- 'n ess andholding effic iencyr somebf the threads of thebolt, and the ref {very :tight' holding fiction against ac {the distortion the threads themsel-v'es'. Homer in iew of thevery: positive re- J the i rg r' mien, the distortion ,Of the. tou r secondary; v I

a r three'dg-taperfofithe distorting member,

in; otherf're'spects, dependent upon h a gva z my be considered as Within the sen ear the following-iclaims.

BtII ClHJiIILiSQ Y 1: After su c'hap "licat1on,' the 'tlls tortion of s 'lsulting binding effect; togetherflwith the intervenin particles'of metal and the adclercl for' eleara'nee of cuttings. I

e fect of, th' member [12, will mainpi jggigli reverse Increment of 'the nut A; 3m Lyeverse movement, however, may {he 7 futthei'nse, the bolt itself is probahlyjren-e derGdJUSeIeSS "for further application, dueto 2 veileetancl aetionof the loekingmeehi tSel fy-"Which' is the main purpose of e :Ihe' ln'ventlon 1 maybe veriou sly {changed or mO dIflGdHI dimBHSIOIIS, slze and'shape of 'and"-loc"1 tion of the cavities Sand.

W articular 'adaptution oipnse to Which' I mvemi n is g to be-pnt', but "all such 1.1 A loeking nut r0 7 hbltsiprofided with gaging the threads of a bolt, and an additional slot in the nut spaced from said slot f '2. The 'combinationwith a threaded bolt,

distorting member I loosely mounted in said tinuous cutting edge at' the corner juncture wlththe side of said member, the nut-havlng shnilar'slot annularlyspaced frolnzsaich slot" for clearance of euttlngsfirstremot'Iecl in said first named slotj slot and havingun inner bearing: encl portion of greater wiclthfthstn the clepth of the slot beyond the=threacls and an opposite smooth thread engaging faceforming a eon-= The combination with a threaded bolt,

of a standard nut therefor provided at one vll slde With a longitudinal slot parallel with the center of the bolt hole,'a 'clistorting member'looselylnountecl insaicl'= s'leta11cl having an inner beering'entl portion "of greater Wlfiltlltllfinftll depthof the slot beyoncl'the f threacl's,zttncl havingan additional-clearance slot for cuttings; I J V In testimony whereof I hereuntdaffiX my signature. I

I ELM-ER W. *UTZ ERI- a 

